AutoMeter Ultra-Lite Electric Pyrometer Gauge - 2-1/16 in. 2010174 Indexing positions the ground strap

Indexing positions the ground strap of the spark plug properly for best piston dome clearance and un-shrouds the electrode for a more even burn and possible gains of 5-15 horsepower

Installation Kit #RJS90906 available (sold separately)

1989-1989 Chevrolet R3500

Aramid outer liner construction

AutoMeter Ultra-Lite Electric Pyrometer Gauge - 2-1/16 in. 2010174 Indexing positions the ground strapWatching your precise exhaust temperature can mean the difference between maximum performance and catastrophic engine damage. On high output diesel or forced induction applications, there are few gauges that are more critical. AutoMeter's Digital Stepper Motor display makes viewing your exact exhaust temperature effortless. The included Type K thermocouple assures maximum accuracy and minimum response time. There is, quite simply, not a better